| categorically(adverb, absolutely, really, exactly, positively) |
| clear cut(expression, adjective, true, acceptable, accurate) |
| close(adjective, correct, right, solid, exact) |
| cognate(appropriate, useful, apt, relevant, connected) |
| come hell or high water(expression, idiom, adverb, really, exactly) |
| comme il faut(expression, adjective, idiom, correct, right) |
| compatible(applicable, germane, pertinent) |
| complete(adjective, good, correct, right, appropriate) |
| concerning(applicable, germane, pertinent) |
| concrete(adjective, close, correct, solid, exact) |
| conformant(adjective, appropriate, important, proper, significant) |
| conforming(right, suitable, applicable, germane, pertinent) |
| congruent(applicable, germane, pertinent) |
| congruous(adjective, good, correct, right, appropriate) |
| consistent(applicable, germane, pertinent) |
| consonant(adjective, appropriate, important, proper, significant) |
| cooking with gas(expression, idiom, correct, right, exact) |
| correlated(organized, relevant, applicable, applied, germane) |
| correspondent(adjective, appropriate, important, proper, significant) |
| cutting(sharp, critical, penetrating, meaningful, incisive) |